Share-Based Compensation - Summary of Information about Restricted Stock Grants Outstanding (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) shares
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Unearned compensation	$ 3.9
November 2013
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	470,997
Unearned compensation	$ 0.4
Remaining Periods (in months)	7 months
October 2014
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	506,171
Unearned compensation	$ 1.2
Remaining Periods (in months)	19 months
April 2015
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	27,174
Unearned compensation	$ 0.1
Remaining Periods (in months)	19 months
July 2015
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	38,772
Unearned compensation	$ 0.2
Remaining Periods (in months)	31 months
January 2016
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	23,852
Unearned compensation	$ 0.1
Remaining Periods (in months)	31 months
March 2016
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	38,758
Unearned compensation	$ 0.1
Remaining Periods (in months)	31 months
Tranche One | October 2015
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	595,509
Unearned compensation	$ 1.5
Remaining Periods (in months)	31 months
Tranche Two | October 2015
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares | shares	138,888
Unearned compensation	$ 0.3
Remaining Periods (in months)	7 months